I have yet another flight from MAN to HRE next weekend, once again with BA and their SA franchise partner, Comair. This time, I might also have a Qantas Club card with me (well, I better had, having coughed up for the speedy delivery option) and so should have lounge access both at MAN, LHR and JNB (at least for the flight back).

Now, T5 has an A concourse and a B concourse with a train between the two. For my last two trips, the LHR->JNB flight has left from the B concourse. Does this mean all flights to JNB would leave from the B concourse or is it all a bit random? Is there a pattern?

I ask because it would be nice just to be able to go over to the B concourse and use the lounge there (assuming they're all of an equivalent quality).